Patch Name: PHKL_30036 Patch Description: s700_800 11.11 FSS cumulative; FSS capping Creation Date: 03/12/09 Post Date: 03/12/18 Repost: 04/03/11 The Other Dependencies section of the patch documentation was modified to clarify that PHKL_30037 must also be installed on systems with the HP-UX Processor Sets software. Hardware Platforms - OS Releases: s700: 11.11 s800: 11.11 Products: N/A Filesets: OS-Core.CORE2-KRN,fr=B.11.11,fa=HP-UX_B.11.11_32,v=HP OS-Core.CORE2-KRN,fr=B.11.11,fa=HP-UX_B.11.11_64,v=HP Automatic Reboot?: Yes Status: General Release Critical: No Category Tags: defect_repair general_release manual_dependencies Path Name: /hp-ux_patches/s700_800/11.X/PHKL_30036 Symptoms: PHKL_30036: ( SR:8606314571 CR:JAGae77335 ) Certain workloads cannot achieve their entitlements with the Fair Share Scheduler (FSS) when capping is enabled. This results in a performance degradation for some workloads. PHKL_29708: ( SR:8606247911 CR:JAGae14311 ) A Process Resource Manager (PRM) and Fair Share Scheduler (FSS) group with a large entitlement and just enough jobs to get that share could be outperformed by a smaller entitlement group with more jobs. ( SR:8606274083 CR:JAGae38161 ) When running the IO based jobs with the Fair Share Scheduler (FSS) enabled via Process Resource Manager (PRM) or Workload Manager (WLM), the observation of performance degradation is 10-20%. Defect Description: PHKL_30036: ( SR:8606314571 CR:JAGae77335 ) Existing algorithms of the fair-share scheduler (FSS) make some decisions which are inappropriate for some workloads when the capping feature of FSS is enabled. This causes processors to remain idle even when some FSS groups have not attained their entitlements. Resolution: The FSS balancer and thread selection algorithms have been modified where capping is enabled so that the processors do not inappropriately idle. This improves the ability of FSS groups to attain their entitlements. Removes the FSS load balancer with the updated FSS balancer in PHKL_30032. PHKL_29708: ( SR:8606247911 CR:JAGae14311 ) Due to the way HP-UX round-robin jobs separately among the processors for each CPU, all groups start on the same CPU. That means on a 4 processor box, if a system has four groups each with 24% and one job, they all ended up sharing the same CPU. A fifth group with only 4% but lots of jobs would end up spread over all the CPUs, and take about 76% of the over all system cycles. Resolution: When distributing jobs on round-robin policy, the start position is different for each group, biggest first. ( SR:8606274083 CR:JAGae38161 ) On a large PRM group count systems, HP-UX walks the run queue once per group. Also, per-group tick accounting is not very precise. Resolution: When a group has fewer jobs than there are cpus, and it is grossly underachieving, systems allow the temporary dedication of sufficient cpus to that group to make reaching the entitlement possible. Enhancement: No SR: 8606247911 8606274083 8606314571 Patch Files: OS-Core.CORE2-KRN,fr=B.11.11,fa=HP-UX_B.11.11_32,v=HP: /usr/conf/lib/libpm.a(balance.o) OS-Core.CORE2-KRN,fr=B.11.11,fa=HP-UX_B.11.11_64,v=HP: /usr/conf/lib/libpm.a(balance.o) what(1) Output: OS-Core.CORE2-KRN,fr=B.11.11,fa=HP-UX_B.11.11_32,v=HP: /usr/conf/lib/libpm.a(balance.o): balance.c $Date: 2003/12/05 14:10:01 $Revision: r11. 11/2 PATCH_11.11 (PHKL_30036) OS-Core.CORE2-KRN,fr=B.11.11,fa=HP-UX_B.11.11_64,v=HP: /usr/conf/lib/libpm.a(balance.o): balance.c $Date: 2003/12/05 14:10:01 $Revision: r11. 11/2 PATCH_11.11 (PHKL_30036) cksum(1) Output: OS-Core.CORE2-KRN,fr=B.11.11,fa=HP-UX_B.11.11_32,v=HP: 415523260 7020 /usr/conf/lib/libpm.a(balance.o) OS-Core.CORE2-KRN,fr=B.11.11,fa=HP-UX_B.11.11_64,v=HP: 2921200231 15752 /usr/conf/lib/libpm.a(balance.o) Patch Conflicts: None Patch Dependencies: s700: 11.11: PHKL_29704 PHKL_30032 PHKL_30033 PHKL_30034 PHKL_30035 s800: 11.11: PHKL_29704 PHKL_30032 PHKL_30033 PHKL_30034 PHKL_30035 Hardware Dependencies: None Other Dependencies: PHKL_30036: On systems with the HP-UX Processor Sets product (PROCSETS) version A.01.00.00.06 installed, PHKL_30037 must be installed with this patch to avoid a system panic. PHKL_29708: To solve the PRM(FSS) entitlement problem related to JAGae14311 in Processor Sets path, PHKL_29709 must be installed. Supersedes: PHKL_29708 Equivalent Patches: None Patch Package Size: 40 KBytes Installation Instructions: Please review all instructions and the Hewlett-Packard SupportLine User Guide or your Hewlett-Packard support terms and conditions for precautions, scope of license, restrictions, and, limitation of liability and warranties, before installing this patch. ------------------------------------------------------------ 1. Back up your system before installing a patch. 2. Login as root. 3. Copy the patch to the /tmp directory. 4. Move to the /tmp directory and unshar the patch: cd /tmp sh PHKL_30036 5. Run swinstall to install the patch: swinstall -x autoreboot=true -x patch_match_target=true \ -s /tmp/PHKL_30036.depot By default swinstall will archive the original software in /var/adm/sw/save/PHKL_30036. If you do not wish to retain a copy of the original software, include the patch_save_files option in the swinstall command above: -x patch_save_files=false WARNING: If patch_save_files is false when a patch is installed, the patch cannot be deinstalled. Please be careful when using this feature. For future reference, the contents of the PHKL_30036.text file is available in the product readme: swlist -l product -a readme -d @ /tmp/PHKL_30036.depot To put this patch on a magnetic tape and install from the tape drive, use the command: dd if=/tmp/PHKL_30036.depot of=/dev/rmt/0m bs=2k Special Installation Instructions: None